Control and Co-ordination Flashcards
exam
What is the primary function of the nervous system?
To control and coordinate the activities of the body.
What are the two main types of cells in the nervous system?
Neurons and glial cells.
True or False: Hormones are the only means of communication in the body.
False.
Fill in the blank: The basic functional unit of the nervous system is the ______.
Neuron.
What are the two divisions of the nervous system?
Central nervous system (CNS) and peripheral nervous system (PNS).
What is the role of the brain in control and coordination?
To process information and send signals to the body.
Which part of the neuron receives signals from other neurons?
Dendrites.
What is the function of the myelin sheath?
To insulate the axon and speed up nerve impulse transmission.
True or False: Reflex actions are controlled by the brain.
False.
What is a synapse?
The junction between two neurons where communication occurs.
Which neurotransmitter is primarily involved in muscle contraction?
Acetylcholine.
What is the role of the spinal cord?
To transmit signals between the brain and the rest of the body.
Fill in the blank: The ______ nervous system controls voluntary actions.
Somatic.
What is the function of the autonomic nervous system?
To control involuntary body functions.
Which part of the brain is responsible for balance and coordination?
Cerebellum.
True or False: Hormones are released directly into the bloodstream.
True.
What is homeostasis?
The maintenance of a stable internal environment in the body.
What is the role of the hypothalamus?
To regulate body temperature, hunger, and thirst.
Fill in the blank: The ______ gland is known as the ‘master gland’ of the endocrine system.
Pituitary.
What type of feedback mechanism do hormones typically use?
Negative feedback.
What are the main functions of the endocrine system?
To produce hormones and regulate bodily functions.
Which hormone regulates blood sugar levels?
Insulin.
What is the primary role of adrenaline?
To prepare the body for ‘fight or flight’ response.
True or False: The adrenal glands produce hormones that help manage stress.
True.
What is the function of the thyroid gland?
To regulate metabolism.
Fill in the blank: The ______ is responsible for the ‘fight or flight’ response.
Sympathetic nervous system.
What is the role of the pancreas in the endocrine system?
To produce insulin and glucagon.
Which hormone is responsible for regulating sleep-wake cycles?
Melatonin.
What is the primary function of the reproductive hormones?
To regulate sexual development and reproduction.
True or False: The nervous system responds more quickly than the endocrine system.
True.
What part of the brain regulates emotions?
Limbic system.
Fill in the blank: The ______ system is responsible for the body’s response to stress.
Endocrine.
What is the primary role of the somatic nervous system?
To control voluntary movements.
Which type of neurons carry signals to the brain?
Afferent neurons.
What is the function of efferent neurons?
To carry signals away from the brain to muscles and glands.
True or False: The brain can regenerate neurons.
False.
What is the role of glial cells in the nervous system?
To support and protect neurons.
Fill in the blank: The ______ is the outer layer of the brain.
Cerebral cortex.
What is the purpose of the blood-brain barrier?
To protect the brain from harmful substances.
